Data/hora: 06/06/2024 09:47:30

Provedor de dados: | 5
País: | France
Título: | Growth of Northwest Iberian juvenile hake estimated by combining sagittal and transversal otolith microstructure analyses
Autores: | Pineiro, C; Rey, J; De Pontual, Helene; Garcia, A.
Data: | 2008-09
Ano: | 2008
Palavras-chave: | NW Iberian waters; Seasonal variation; Daily growth; Otolith microstructure; Juvenile hake.
Resumo: | Daily growth of Atlantic juvenile hake from Northwest Iberia has been estimated employing a new approach combining analyses of transversal and sagittal sections of the otoliths along the ventral radius. Age of juvenile hake ranging from 3 to 25 cm collected during a spring 2002 survey was estimated. Somatic growth followed a power fit: Fish size (TL) = 3.3254*age(0.7336) (r(2) =0.87, p &lt; 0.001, n = 76). yielding an average individual growth rate of 0.66 mm/day (0.06). The growth model indicates that after a year's life a juvenile can reach 25 cm. Otolith ventral radius ranged from 401 to 1842 mu m and daily increments were between 104 and 387. Fish growth and otolith growth were closely related (r(2) = 0.92 p &lt; 0.001, n = 76). These first results of daily growth rates for the Southern stock corroborate the fast-growth hypothesis of this species. The evolution of increment widths from hatch dates onwards reveals important seasonal growth peaks during July-August and October-November. A comparison with prior data and discussion is also presented in the light of recent work on hake juveniles and tagging-recapture experiences. (c) 2008 Elsevier B.V. All rights reserved.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2008/publication-6111.pdf

DOI:10.1016/j.fishres.2008.04.001

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/6111/
Formato: | application/pdf
Fonte: | Fisheries Research (0165-7836) (Elsevier), 2008-09 , Vol. 93 , N. 1-2 , P. 173-178
Fonte: | 2008 Elsevier